Touching the screen causes pixel shaders to perturb time. The NextWindow sensor triggers the images to flow between the same scene before and during a lightning strike.

Two buffers are created in OGSL. The first holds a touch map which decays over time. The result is that as you move your finger around the screen it leaves a fading trail behind it. The second buffer is a height grid. This is perturbed by the motion triggering ripples.

Rather than distort and shadow the image using the height map, the relative intensity is used to cross fade between images taken in the same exact location, but at different times. We are working on extending this effect to work on longer sequences and to make the area and strength of the effect proportional to the amount of contact made with the touch surface.

Software by www.fingertapps.com Photos by www.ronnieworld.com

Cheers
  Dave